Design and Application of Low Cost Redundancy Interface for UAV Distributed Servo System
The paper presents the low cost redundancy interface applied in distributed servo system of unmanned aerial vehicle(UAV).Digital bus and analog dual-redundancy control interface is implemented, it can switchs to analog interface automatically when the digital bus works abnormally, the reliability and the antijamming capability of servo system are made to be promoted. CAN bus is chosen to be the UAV digital bus after analyzing the distributed servo system structure and servo equipments work condition. The operating principle of redundancy interface is expatiated, the hardware interfaces and the software process are provided，and the communication network performance is also analyzed. Both ground test and flight test indicate that the redundancy interface works steadily, CAN bus channel can switch to analog channel fast and smoothly, it can meet the needs of UAV flight control system.
B. An and X. L. Zhang, "Design and Application of Low Cost Redundancy Interface for UAV Distributed Servo System", Applied Mechanics and Materials, Vols. 284-287, pp. 1794-1798, 2013